src/Language.cpp

   1 /**
   2  * \file Language.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  * \author Jean-Marc Lasgouttes
   8  * \author Jürgen Spitzmüller
   9  * \author Dekel Tsur
  10  *
  11  * Full author contact details are available in file CREDITS.
  12  */
  13
  14 #include <config.h>
  15
  16 #include "Language.h"
  17
  18 #include "Encoding.h"
  19 #include "Lexer.h"
  20 #include "LyXRC.h"
  21
  22 #include "support/debug.h"
  23 #include "support/FileName.h"
  24 #include "support/filetools.h"
  25 #include "support/lstrings.h"
  26 #include "support/Messages.h"
  27
  28 using namespace std;
  29 using namespace lyx::support;
  30
  31
  32 namespace lyx {
  33
  34 Languages languages;
  35 Language ignore_lang;
  36 Language latex_lang;
  37 Language const * default_language;
  38 Language const * ignore_language = &ignore_lang;
  39 Language const * latex_language = &latex_lang;
  40 Language const * reset_language = 0;
  41
  42
  43 docstring const Language::translateLayout(string const & m) const
  44 {
  45         if (m.empty())
  46                 return docstring();
  47
  48         if (!isAscii(m)) {
  49                 lyxerr << "Warning: not translating `" << m
  50                        << "' because it is not pure ASCII.\n";
  51                 return from_utf8(m);
  52         }
  53
  54         TranslationMap::const_iterator it = layoutTranslations_.find(m);
  55         if (it != layoutTranslations_.end())
  56                 return it->second;
  57
  58         return from_ascii(m);
  59 }
  60
  61
  62 bool Language::readLanguage(Lexer & lex)
  63 {
  64         enum LanguageTags {
  65                 LA_AS_BABELOPTS = 1,
  66                 LA_BABELNAME,
  67                 LA_ENCODING,
  68                 LA_END,
  69                 LA_GUINAME,
  70                 LA_INTERNAL_ENC,
  71                 LA_LANG_CODE,
  72                 LA_LANG_VARIETY,
  73                 LA_POLYGLOSSIANAME,
  74                 LA_POLYGLOSSIAOPTS,
  75                 LA_POSTBABELPREAMBLE,
  76                 LA_PREBABELPREAMBLE,
  77                 LA_RTL
  78         };
  79
  80         // Keep these sorted alphabetically!
  81         LexerKeyword languageTags[] = {
  82                 { "asbabeloptions",       LA_AS_BABELOPTS },
  83                 { "babelname",            LA_BABELNAME },
  84                 { "encoding",             LA_ENCODING },
  85                 { "end",                  LA_END },
  86                 { "guiname",              LA_GUINAME },
  87                 { "internalencoding",     LA_INTERNAL_ENC },
  88                 { "langcode",             LA_LANG_CODE },
  89                 { "langvariety",          LA_LANG_VARIETY },
  90                 { "polyglossianame",      LA_POLYGLOSSIANAME },
  91                 { "polyglossiaopts",      LA_POLYGLOSSIAOPTS },
  92                 { "postbabelpreamble",    LA_POSTBABELPREAMBLE },
  93                 { "prebabelpreamble",     LA_PREBABELPREAMBLE },
  94                 { "rtl",                  LA_RTL }
  95         };
  96
  97         bool error = false;
  98         bool finished = false;
  99         lex.pushTable(languageTags);
 100         // parse style section
 101         while (!finished && lex.isOK() && !error) {
 102                 int le = lex.lex();
 103                 // See comment in LyXRC.cpp.
 104                 switch (le) {
 105                 case Lexer::LEX_FEOF:
 106                         continue;
 107
 108                 case Lexer::LEX_UNDEF: // parse error
 109                         lex.printError("Unknown language tag `$$Token'");
 110                         error = true;
 111                         continue;
 112
 113                 default:
 114                         break;
 115                 }
 116                 switch (static_cast<LanguageTags>(le)) {
 117                 case LA_END: // end of structure
 118                         finished = true;
 119                         break;
 120                 case LA_AS_BABELOPTS:
 121                         lex >> as_babel_options_;
 122                         break;
 123                 case LA_BABELNAME:
 124                         lex >> babel_;
 125                         break;
 126                 case LA_POLYGLOSSIANAME:
 127                         lex >> polyglossia_name_;
 128                         break;
 129                 case LA_POLYGLOSSIAOPTS:
 130                         lex >> polyglossia_opts_;
 131                         break;
 132                 case LA_ENCODING:
 133                         lex >> encodingStr_;
 134                         break;
 135                 case LA_GUINAME:
 136                         lex >> display_;
 137                         break;
 138                 case LA_INTERNAL_ENC:
 139                         lex >> internal_enc_;
 140                         break;
 141                 case LA_LANG_CODE:
 142                         lex >> code_;
 143                         break;
 144                 case LA_LANG_VARIETY:
 145                         lex >> variety_;
 146                         break;
 147                 case LA_POSTBABELPREAMBLE:
 148                         babel_postsettings_ =
 149                                 lex.getLongString("EndPostBabelPreamble");
 150                         break;
 151                 case LA_PREBABELPREAMBLE:
 152                         babel_presettings_ =
 153                                 lex.getLongString("EndPreBabelPreamble");
 154                         break;
 155                 case LA_RTL:
 156                         lex >> rightToLeft_;
 157                         break;
 158                 }
 159         }
 160         lex.popTable();
 161         return finished && !error;
 162 }
 163
 164
 165 bool Language::read(Lexer & lex)
 166 {
 167         as_babel_options_ = 0;
 168         encoding_ = 0;
 169         internal_enc_ = 0;
 170         rightToLeft_ = 0;
 171
 172         if (!lex.next()) {
 173                 lex.printError("No name given for language: `$$Token'.");
 174                 return false;
 175         }
 176
 177         lang_ = lex.getString();
 178         LYXERR(Debug::INFO, "Reading language " << lang_);
 179         if (!readLanguage(lex)) {
 180                 LYXERR0("Error parsing language `" << lang_ << '\'');
 181                 return false;
 182         }
 183
 184         encoding_ = encodings.fromLyXName(encodingStr_);
 185         if (!encoding_ && !encodingStr_.empty()) {
 186                 encoding_ = encodings.fromLyXName("iso8859-1");
 187                 LYXERR0("Unknown encoding " << encodingStr_);
 188         }
 189         // cache translation status. Calling getMessages() directly in
 190         // PrefLanguage::PrefLanguage() did only work if the gui language
 191         // was set to auto (otherwise all languages would be marked as available).
 192         translated_ = getMessages(code()).available();
 193         return true;
 194 }
 195
 196
 197 bool Language::readLayoutTranslations(Lexer & lex)
 198 {
 199         layoutTranslations_.clear();
 200         while (lex.isOK()) {
 201                 if (lex.checkFor("End"))
 202                         break;
 203                 if (!lex.next(true))
 204                         return false;
 205                 string const key = lex.getString();
 206                 if (!lex.next(true))
 207                         return false;
 208                 docstring const val = lex.getDocString();
 209                 layoutTranslations_[key] = val;
 210         }
 211         return true;
 212 }
 213
 214
 215 void Language::readLayoutTranslations(Language const & lang)
 216 {
 217         layoutTranslations_ = lang.layoutTranslations_;
 218 }
 219
 220
 221 void Languages::read(FileName const & filename)
 222 {
 223         Lexer lex;
 224         lex.setFile(filename);
 225         lex.setContext("Languages::read");
 226         while (lex.isOK()) {
 227                 int le = lex.lex();
 228                 switch (le) {
 229                 case Lexer::LEX_FEOF:
 230                         continue;
 231
 232                 default:
 233                         break;
 234                 }
 235                 if (lex.getString() != "Language") {
 236                         lex.printError("Unknown Language tag `$$Token'");
 237                         continue;
 238                 }
 239                 Language l;
 240                 l.read(lex);
 241                 if (!lex)
 242                         break;
 243                 if (l.lang() == "latex")
 244                         latex_lang = l;
 245                 else if (l.lang() == "ignore")
 246                         ignore_lang = l;
 247                 else
 248                         languagelist[l.lang()] = l;
 249         }
 250
 251         default_language = getLanguage(lyxrc.default_language);
 252         if (!default_language) {
 253                 LYXERR0("Default language \"" << lyxrc.default_language
 254                        << "\" not found!");
 255                 default_language = getLanguage("english");
 256                 if (!default_language)
 257                         default_language = &(*languagelist.begin()).second;
 258                 LYXERR0("Using \"" << default_language->lang() << "\" instead!");
 259         }
 260
 261         // Read layout translations
 262         FileName const path = libFileSearch(string(), "layouttranslations");
 263         readLayoutTranslations(path);
 264 }
 265
 266
 267 void Languages::readLayoutTranslations(support::FileName const & filename)
 268 {
 269         Lexer lex;
 270         lex.setFile(filename);
 271         lex.setContext("Languages::read");
 272         while (lex.isOK()) {
 273                 if (!lex.checkFor("Translation")) {
 274                         if (lex.isOK())
 275                                 lex.printError("Unknown layout translation tag `$$Token'");
 276                         break;
 277                 }
 278                 if (!lex.next(true))
 279                         break;
 280                 string const code = lex.getString();
 281                 // we need to mimic gettext: code can be a two-letter code,
 282                 // which should match all variants, e.g. "de" should match
 283                 // "de_DE", "de_AT" etc.
 284                 Language * firstlang = 0;
 285                 LanguageList::iterator const end = languagelist.end();
 286                 for (LanguageList::iterator it = languagelist.begin(); it != end; ++it) {
 287                         // special case for chinese:
 288                         // simplified  => code == "zh_CN", langcode == "zh_CN"
 289                         // traditional => code == "zh_TW", langcode == "zh_CN"
 290                         string const langcode = it->second.code();
 291                         string const name = it->second.lang();
 292                         if ((code == langcode && name != "chinese-traditional") ||
 293                             (code == "zh_TW" && name == "chinese-traditional") ||
 294                             (code.size() == 2 && langcode.size() > 2 &&
 295                              code + '_' == langcode.substr(0, 3))) {
 296                                 if (firstlang)
 297                                         it->second.readLayoutTranslations(*firstlang);
 298                                 else {
 299                                         if (!it->second.readLayoutTranslations(lex)) {
 300                                                 lex.printError("Could not read "
 301                                                                "layout translations "
 302                                                                "for language `" +
 303                                                                code + "'");
 304                                                 break;
 305                                         }
 306                                         firstlang = &(it->second);
 307                                 }
 308                         }
 309                 }
 310                 if (!firstlang) {
 311                         lex.printError("Unknown language `" + code + "'");
 312                         break;
 313                 }
 314         }
 315 }
 316
 317
 318 Language const * Languages::getLanguage(string const & language) const
 319 {
 320         if (language == "reset")
 321                 return reset_language;
 322         if (language == "ignore")
 323                 return ignore_language;
 324         const_iterator it = languagelist.find(language);
 325         return it == languagelist.end() ? reset_language : &it->second;
 326 }
 327
 328
 329 } // namespace lyx